/Engine/Source/Runtime/Engine/Classes/Engine/CloudStorageBase.h
Once a document has been read in, use this to return a string representing the entire document. This should only be used if SaveDocumentWithString was used to generate the document.
The document as a string. It will be empty if anything went wrong.
virtual [FString](API\Runtime\Core\Containers\FString) ParseDocumentAsString ( int32 Index, bool bIsForConflict )